api.c

/*
 * Copyright 2014 IBM Corp.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/anon_inodes.h>
#include <linux/file.h>
#include <misc/cxl.h>

#include "cxl.h"

struct cxl_context *cxl_dev_context_init(struct pci_dev *dev)
{
	struct cxl_afu *afu;
	struct cxl_context  *ctx;
	int rc;

	afu = cxl_pci_to_afu(dev);

	get_device(&afu->dev);
	ctx = cxl_context_alloc();
	if (IS_ERR(ctx))
		return ctx;

	/* Make it a slave context.  We can promote it later? */
	rc = cxl_context_init(ctx, afu, false, NULL);
	if (rc) {
		kfree(ctx);
		put_device(&afu->dev);
		return ERR_PTR(-ENOMEM);
	}
	cxl_assign_psn_space(ctx);

	return ctx;
}
EXPORT_SYMBOL_GPL(cxl_dev_context_init);

struct cxl_context *cxl_get_context(struct pci_dev *dev)
{
	return dev->dev.archdata.cxl_ctx;
}
EXPORT_SYMBOL_GPL(cxl_get_context);

struct device *cxl_get_phys_dev(struct pci_dev *dev)
{
	struct cxl_afu *afu;

	afu = cxl_pci_to_afu(dev);

	return afu->adapter->dev.parent;
}
EXPORT_SYMBOL_GPL(cxl_get_phys_dev);

int cxl_release_context(struct cxl_context *ctx)
{
	if (ctx->status != CLOSED)
		return -EBUSY;

	put_device(&ctx->afu->dev);

	cxl_context_free(ctx);

	return 0;
}